how can you know if mine have a problem? As I said, the sound is good, they is no obvious flaws. However, the high are slight more harsh, the vocal seems a bit more in the background. its small differences really. goignj from 100% to 90$ I would say...
yes I do need a preamp. I have two outputs (one for my mid and tweeter and one for my bass, im bi-amping my speakers) and I added a crossover in one of the outputs.

Well, you stressed the flaws to the sound with the buffer inserted, therefore most people thought you have a problem in your B1.
According to your signature I assumed you were using headphones.

__________________"The total harmonic distortion is not a measure of the degree of distastefulness to the listener and it is recommended that its use should be discontinued." D. Masa, 1938

lol, no. thanks for the help now, I may have asked a bit too early for guidance.
thing is, right now, as we are speaking, I am rebuilding my push pull tube amp with a whole new design and also just finishing my three-way project (I actually finished the crossover yesterday!). I will be back to the preamp situation once everything is done and that im ready to really concentrate on the pre amp situation. I will probably build a tube pre to compare to get my conscience clear.